What Has Changed? The 2026 Building Consent Exemption Explained
Under the new building consent exemption, a small standalone minor home may not need building consent if it meets all of the following criteria:
- Is standalone and single-storey
- Has a simple design
- Meets the New Zealand Building Code
- Is built or supervised by licensed building professionals
- Meets all other exemption conditions
Along side this, the National Environmental Standards for Detached Minor Residential Units allow some minor dwellings to be treated as a permitted activity - meaning resource consent may not be required if the standards are met.
What the 2026 Changes Mean for NZ Homeowners
For the right site, the new rules could make it faster and more affordable to add flexible living space to your property.
A minor home could be used for:
- Is standalone and single story
- Ageing parents or in-laws
- Adult children getting onto the property ladder
- Rental income to help offset mortgage costs
- Guest accommodation
- A dedicated work-from-home space
- Future-proofing your property
MBIE has indicated the changes could save homeowners up to $5,650 in direct costs and reduce build timeframes by up to 14 weeks - a significant benefit for anyone considering adding a granny flat or secondary dwelling to their property.
What Still Needs to Happen: Minor Home Requirements in 2026
Even where building consent is not required, there are still important legal steps homeowners must follow.
Before building starts, you must obtain a Project Information Memorandum (PIM) from your local council, notify the council of the project, and provide documentation once the build is complete - including plans, Records of Work and relevant certificates.
It is also important to understand that councils may still charge development contributions or infrastructure-related fees, depending on the location and the impact the additional dwelling has on local services such as water, waste water, stormwater, roading and reserves. These costs can vary significantly between councils and sites, so checking early is essential.
Sites That May Still Need Extra Checks
Some sites will still require additional investigation due to:
- Zoning requirements
- Flood or hazard overlays
- Drainage constraints
- Access requirements
- Infrastructure limitations
- Council-specific rules or consent notices
That is why early site investigation and planning remains extremely important - even under the new 2026 rules.
Common Misunderstandings About the New Granny Flat Rules in NZ
The 2026 consent exemption has generated a lot of interest - and some confusion. Here is what the rule change does not mean:
- Anyone can build one regardless of their site or circumstances
- The Building Code no longer applies
- Council is completely removed from the process
- Every site will automatically qualify for the exemption
- The minor home can automatically be subdivided or sold separately
- There will be no impact on rates, services or development contributions
Our Advice: How to Build a Minor Home in NZ the Right Way
Start with the site.
Before getting too far into design or budget planning, check the zoning, set backs, services, access, drainage, hazards and council requirements specific to your property. The success of a minor home depends on more than simply keeping it under 70m2.
At Ultimate Builders, we help homeowners across New Zealand navigate exactly this process. We look at the full picture - your needs, the site, the budget, the rules and the long-term use of the dwelling - so you are not caught out later.
A minor home may be smaller than your main house, but it still needs smart design, careful planning and quality construction to work well - now and in the future.
Done well, the 2026 rule changes create a real opportunity for New Zealand homeowners to make better use of their land. Done poorly, they could still create costly issues down the track.
The key is to keep it simple, compliant and well thought through from the start.
